Cutting machine



A. P. KOMOW CUTTING MACHINE Nov. 14, 1933.

Filed May 7, 1952 2 Sheets-Sheet l INVENTOR HLBERT P KoMow- BY 0.. OR EYPatented Nov. 14, 1933 u-rrs it Y 1,935,155

g p CUTTING MACHINE I Albert Komow, Brooklyn, N. Y. Application ay 7,1932. Serial No. 609,815 solaims. '(01. 164 75) 7 This invention relatesto cutting machinesand in particular to a hand guided; machine; used inthe cutting of cloth and other textile fabrics.

A particular object of my invention is to overcome objectionable:featuresifound in machines.

and an electrical connector so that the two latter devices will notbecome loosened and the vibration will be eliminated particularly in thelamp so that the filament thereof will not be destroyed.

A still further object of my invention is the provision ofa handle castintegral witha part. of the motor housing, it having been found that.

in machines of this character theme of screws is objectionable in thatthe vibration loosens,

them and permitsth'e parts'to becomeseparated.

Changes and variations may be made'inthe' construction shown anddescribed without'departing from the principles of the invention .or.

O sacrificing its chief advantages; hence such'invention is not to beconfined-to .the structures.

shown in the accompanying drawings,.in..which; Figure 1 is aview in sideelevation of a. cut; ting machine constructed in accordance'with myinvention, the presser foot rod and'its regulating partsbeingillustrated; as well as otherfeatures.

ofmy invention. I V

Figure 2 is a view in front elevation showing the parts of themachineand illustrating how the o presser foot rod is controlled in itsvertical movement. w a

Figure 3 is an enlarged section: taken onthe lines 33 of Figure 2illustrating the method of securing the clamp to the presser footrod,and

' Figure 4 isa fragmentary sectional elevation taken substantially ontheline 44 of --Figure.-2

and illustrating the lubricating means employed in the reciprocatingparts 'of the machine;

' Figure 5 is a section taken on the line 5--5 of Figure 4illustrating-the method of oiling. the

slide surfaces of thecross head and the wrist pin bushing. 1 L 1Referring to the drawings in detail, 5 indicates an exposedportionofafmotorfencased at its opposite ends in the rear housing "6 andat its forward end in the front housing '7. I The front housing 7 isprovided with a depending portion 8 to which is secured a switch housing9 and. handle 10, the switch housing being-provided with the usualstarting switch buttonll which may be operated by 'the hand of the oneguiding the ma.-

chine. To this depending portion 8 is secured,

the guide 12 through the medium of the bracket 13 which is secureddirectly to the depending portion 8 of the front housing 7 inanysuitable manner, the guide 12 at its lower end isssuitably secured inthe base 14, the construction of which is well known and need not bedescribed, it being sufficient to note that the base .14 is slottedwheretheguide 12 enters the same so that a reciproeating knife 15 operable inthe guide 12 may pass downwardly into the base 14 so as to effectivelycut materialindicated by the dot and dash line 16 that is resting on theplate or rathenunder which the plateor base 14 is passing, it beingunderstood that the machine is guidedby the operator who holds thehandlev and the reciprocations of the knife or cutting element 15effectively. cuts through the material. I l

The fronthousing '7 is furjther provided with a side projection 16 towhich is secured the upstanding spring arm 1'], the upper end-of whichis offset as at l8 and so positioned that an electric contact plug i9maybe forced downwardly into suitable contact sockets provided in thepro- 5 jection ldpassed the strip 17 which will yield. during thepassage of the:'p1ug19,;but when the plug 19 is in thefinal. position,will assume a position whereby the upper, portion 18 thereof will engageover the edge ofthe plug 19 and hold the same securely in position. Thisfeatureof my invention overcomes the objection heretofore present inthat the vibrations of the machine duringoperation have a'tendency toloosen the contact plug 19 so that it finally 5 worked out of thesockets in which it was held and broke the circuit. I g

A spring strip 20 is also attached as at .21 to the projection 16 andsupports at its outerend, the lamp socket 22,] the wires from which areencased-inthe coil conduit 23 leading into the projection 16 to asuitable source of contact with the sockets in which the plug .-19 ispositioned. The strip 20 supporting the lampisgflexible and will take upthe vibrations of, the machine so that the filament or i the lamp bulbwill not become readily broken due to the constant vibration and thestrip 20 having pivotal connection as at 21 with the projection 16, maybe swung from side to side to throw the-light atany desired pointReferring to the lubricating feature of my invention, attention isdirected particularly to Figure 4 where it will be noted that the fronthousing 7 is provided with an integral circular boss 24, recessed as at25 to provide a seat for the ball bearing 26, through which passes themotor shaft 27 carrying at its outer end, the eccentric disk 28. To thiseccentric disk is pivoted in any suitable manner, one end of theconnecting rod 29, the lower end being pivoted through the medium of thepin 30 with a cross head 31 which, operating in the suitable cross headguides 32, causes reciprocation of the cutting knife 15 which is securedto the lower end of the cross head in any suitable manner, thisconnection not being shown as it is not deemed to be a part of myinvention. 7

A cover 33 is provided for the front housing to cover the mechanism justdescribed and at the top of this cover 33, I provide an oil cup 34 ofthe usual character, the opening 35 of the cover 33 in which the oil cupis disposed, being in alignment with a vertical bore 36 provided in theboss 24. This bore 36 passes vertically through the boss 24 and opens atone side into the seat or cut-out 25 provided for the reception of theball bearing 26 with the result that this ball bearing 26 is lubricatedand excess lubricating fluid flows down through the bore-36 and into awell 37 provided in the upper end of a protuberant portion 38 formed onthe front housing 7 and adapted to act as a support for the cross headguides 32 whichare secured thereto. This well .37 is provided with anoutlet pipe 39 through which extends a Wick 40, one end of which iscoiled in the well 37 and the other of which depends from the mouthofthe pipe 39'so that it seats in a chamber 41 provided in the upper ,endof the cross head 31 each time that the cross head reaches its highestposition so that lubricating fluid accumulating on the depending end ofthe wick- 40 is transferred to the chamber 41 on the cross headandflowing through the bore 42 of the hollow pin 30, lubricates the lower'pin30 is further perforated in its connecting rod holding portion sothat the oil may be lead from the-pin bore to an annular groove '78 onthe outside of the pin 30. l v

The cover 33, as shown in Figure 1, is provided with the extendedportion 43 through which the presser foot rod 44 has sliding movement,carrying at its lower end, the presser foo-t 45 which is bifurcated atone side to fit about the knife 15 and edges of the guide 12, an eye oropening 46 being provided in the presser foot 45 through which may beobserved the point where the knife cuts the material. The rod 44 isserrated as at 47 along one side thereof and above the extension 43 hasslidably secured thereto, the clamp. 48. This clamp, as illustrated inFigure'3, consists of the thumb screw 49 which is threaded into theclamp 48. and has its. inner. end swedged over. as at 50 so that itsmovement outwardly is limited, its movement inwardly causing the block51,.one face of which fits the contourof the rod tention on the part ofthe operator.

44, to frictionally engage the rod so that the clamp 48 is securedthereto in any adjusted position desired. The clamp is used for limitingthe downward movement of the foot and one of its uses may be illustratedwhen the knife is sharpened and the foot has been previously set to apredetermined thickness of material. The rod 44 is pushed up so that theknife may be sharpened and when the rod is permitted to drop, the clamphaving been previously secured in the proper position, will permit thefoot to come to rest at the previous position without at- The clamp alsopermits movement of the rod so that the foot can follow the contour ofthe cloth or the surface thereof without causing the cloth to buckle orbulge in front of the foot as the machine is moved through the cloth ina cutting operation. The rod 44 is circular in cross section and due tothis fact, the foot itself is selfcentering and does not bind on theknife guide alongside of which the ends of the presser foot closely fit.In order that the rod 44 may be released or may be freed so thatit mayhave vertical movement in. either direction, use is made of a retainingmember in the nature of a plunger 52, the outer end of which conforms tothe shape of and closely fits against a cam 53. This cam, eccentric'allymounted on the rod 54, and by means of spring. 59, illustrated in Figure1, serves to keep the plunger 52 in contact with the serrated surface 47of the rod 44 against the action of the spring 55 positioned in asuitable receptacle formed in the projection 43 of the cover 33. Theinner end. of the plunger 52 is reduced in diameter to provide room forthe operation of the spring and the end of the reduced portion 56 may beserrated to closely fit the serrations 4'? of the rod 44.

The shaft or rod 54 upon which the cam 53 is mounted extends through theears 5'7 formed integral with the cover 33. To one of these spaced ears5'? is secured one end 58 of a coil spring59 positioned over the rod 54and having of the spring 59. so ,that the tendency of the cam to forcethe plunger 52 inwardly vwill be accomplished. with greater force, ifdesired, and

the rod 44 will be held securely in position. The

end of the shaft 54 terminates in a curved handle portionc63 which liesadjacent the handle 10/ of. the machine so that it can be operated bythe hand of the operator thatengages the handle 10 and a movement ofthehandle 63 in the direction and tothe position indicated in outline in.Figure 2, Will]. operate the camv 53 to 1 1 permit the spring 55 toforce the plunger 52 away from the rod 44 to release the same and permitfree movement of the presser foot 45, if the same is resting on thecloth or permit raising or lowering movement thereof, it beingunderstood that releasing of the handle 63 will immediately cause therod 44 to be held in any adjusted position.

A further feature of my invention, as illustrated in Figures 1 and2, isthat the front housing is provided with an integrally formed handle 1 64having the latterly extending. finger pieces 65 through the medium ofwhich the machine may be lifted.

In practice, it has been the custom to secure a separatehandle tothe-motor housing by screws but the constant vibration of the machinehas loosened the screws and during the carrying of the machine, thehandle has come off and permitted the machine to drop with the resultingdamage to the machine itself and the person carrying the same. I

It is evident, therefore, that I have provided features in connectionwith a cutting machine of the character referred to which facilitate itsoperation, cut down the expense of operating and relieve the attendantof attention to a number of details, thus permitting him to turn outmore work and pay more attention to the operation of the machine whichmust be closely attended to, to prevent spoilage of material.

My invention is not to be restricted to the precise details ofconstruction shown since various changes and modifications may be madetherein without departing from the scope of the invention or sacrificingthe advantages derived from its use.

What I claim is:-

1. The combination, in a machine of the character described, of a motorhousing, a handle extending therefrom, a presser foot, a rod, serratedalong one side and passing through said housing and carrying saidpresser foot at its lower end, a plunger normally in engagement with theserrations of said rod to maintain the rod in an adjusted position, arevolvable cam for permitting disengagement of said plunger from saidrod, a shaft for revolving said cam, and said shaft constituting afinger piece extending. rearwardly to a point adjacent said handle.

2. The combination, in a machine of the character described, of a motorhousing, a handle, a presser foot, a serrated rod passing through saidhousing and carrying said presser foot at its lower end, a plungernormally in engagement with the serrations of said rod to maintain therod in an adjusted position, a cam for permitting disengagement of saidplunger from said rod, a shaft for operating the cam, said shaftconstituting a finger piece extending rearwardly to a point adjacentsaid handle, and a clamp adjustable on said rod for limiting themovement thereof in one direction when said cam is operated.

3. The combination in a machine of the character described, of a motor,a housing therefor, a shaft passing through the housing, a boss on thehousing constituting a journal for the shaft and having a vertical oilbore therein, a well integrally formed in the housing beneath, and inalignment with, said bore, a reciprocating cross head having a pocket inthe upper surface thereof, a wick extending out of said well and havingits end arranged to engage in said pocket at. a point of travel of saidcross head to transfer lubricating fluid from the well to the pocket,and passages from the pocket to the slide faces of said cross head.

4. The combination in a machine of the character described, of a motor,a housing therefor, a shaft passing through the housing, a boss on thehousing constituting a journal for the shaft and having a vertical oilbore therein, a well in the housing beneath, and in alignment with, saidbore, a reciprocating cross head having a pocket in the upper facethereof, a wick extending out of said well and having its end arrangedto engage said pocket at a point of travel of said cross head totransfer lubricating fluid from the well to the pocket by momentarycontact of the wick and pocket, passages from the pocket to the slidefaces of said cross head, an eccentric rod, a bored pin for securing theeccentric rod to the cross head, and a passage from the cross headpocket to said pin bore for lubri-- cating said eccentric rod.

5. The combination in a machine of the character described, of a motorhousing, a handle formed integral with said housing, a rod, a

presser foot carried by the rod, said rod having a serrated side andbeing round, whereby the presser foot is self-aligning with a cutter,means for holding the rod in adjusted position including a spring, a camand a plunger, means for adjusting the tension on the spring, and afinger shaft for operating the cam extending rearwardly to a pointadjacent said handle.

ALBERT P. KOMOW. [L.S.]

